High Quality Content by WIKIPEDIA articles! Nicholas "Nick" Leeson (born 25 February 1967) is a former derivatives broker whose fraudulent, unauthorized speculative trading caused the collapse of Barings Bank, the United Kingdom`s oldest investment bank, for which he was sent to prison. Since leaving prison in 1999 he became, and subsequently resigned as, the CEO of Irish football club Galway United and is active on the keynote / after-dinner speaking circuit where he advises companies about risk and corporate responsibility.